1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xad0051dd1421f435bb798c68bcac99050b36350b906e1028b4448038119a818f. Chain 2 (Bitcoin): anchored in block 953407 (2026-06-12T19:24:56Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/ab1042c9-3fcd-4455-ab67-8956668e8c8e.json and https://artists.proofprofile.net/proofs/artist/ab1042c9-3fcd-4455-ab67-8956668e8c8e.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c680795eb8a6dafe0b5808aeb8358f1734b419bc23aecf5b4306e232e477a7f. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x87b5adf9dae8f250c4ee0723e025351f2f99130d172a6e3bef3ad861b2ce3c91. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400003.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa0b7e895ee9a8670a9e996c62d3d09726e4e84979e1f6941421f19e029bfb676. Chain 2 (Bitcoin): anchored in block 958140 (2026-07-15T10:05:23Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400004.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3920a4dc4a19d3f6402f486484b07d0be7d05ed58f98cc53eca8b93100d6885e. Chain 2 (Bitcoin): anchored in block 956551 (2026-07-03T21:18:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400005.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3b3f44f65a4c8c7e1d4626b2999598f19c9437587e869008b212d48af8d79a2d. Chain 2 (Bitcoin): anchored in block 958838 (2026-07-20T07:01:21Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400006.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xedba7135bf96181a85af401996cea4e4d912a57987b6349ae499eae22c416f53. Chain 2 (Bitcoin): anchored in block 958079 (2026-07-15T00:21:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400007.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9cabfe687b06f70003886ae2d58bb0d5a0bd1d790f03b0092f8728c01a52a151. Chain 2 (Bitcoin): anchored in block 956545 (2026-07-03T19:59:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400008.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0c680795eb8a6dafe0b5808aeb8358f1734b419bc23aecf5b4306e232e477a7f. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400002.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x25584d6434efc11992ac1b8ad079552efbea277bd0e1e64239ac47546966c6ce. Chain 2 (Bitcoin): anchored in block 958316 (2026-07-16T19:42:29Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400025.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x386e649f4b0b07c5be7c8717c64cbb7c815c6776f691920ad331535ac3a9763a. Chain 2 (Bitcoin): anchored in block 958504 (2026-07-18T05:41:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400026.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229a19d6888c32531f1e3c591fc4d75981c9fa88e475f0e4fdd7dd6d65db1542. Chain 2 (Bitcoin): anchored in block 956474 (2026-07-03T08:56:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x6c691d63c49964db2b644754f2b2a7b3821593252023cf4e553224950b7aeebe. Chain 2 (Bitcoin): anchored in block 958607 (2026-07-18T21:01:11Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400016.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9c59c2a83d490700a4af799b090cf5f1ec81c5d6073c0d3c6fe855aeca995e08. Chain 2 (Bitcoin): anchored in block 958738 (2026-07-19T13:10:36Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400017.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14d9a676e9e24f886b068fda2fbb6a302de3495c9988a14829aa5d0b86df1d23. Chain 2 (Bitcoin): anchored in block 958543 (2026-07-18T11:58:44Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400018.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x58b8994b7f7ffdf5d5888aec0fcc3c9fed19a0cf9569bbc2ae7e1e672449d2df. Chain 2 (Bitcoin): anchored in block 958567 (2026-07-18T15:22:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400019.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x9543a6377659aa48f8f8c004415513765a248386d2471fa95c630e22b7976846. Chain 2 (Bitcoin): anchored in block 958576 (2026-07-18T16:22:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400020.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x229a19d6888c32531f1e3c591fc4d75981c9fa88e475f0e4fdd7dd6d65db1542. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400015.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xfe7928f77f04eab8b15c4c830c7a437a728f9e7eccb8d70fbbec5e422355cbf1. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400009.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0ab8e82144954f7a5c828cc94a1496deef9c4eebea2db984035777de64774f3e. Chain 2 (Bitcoin): anchored in block 958812 (2026-07-20T03:24:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400010.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x98b8eb9274a832c7683e0777405a5a885845761bb0e3276889e7031e08c01973. Chain 2 (Bitcoin): anchored in block 958770 (2026-07-19T19:26:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400011.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x29ff089d15cf366f95ecc472247a0d5bdd301ef61fc86be8198394723eabbf96. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400012.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1f683f4dc3ecb6145783421eba65371970b39d53c7e267ce2a13966e1499545b. Chain 2 (Bitcoin): anchored in block 956578 (2026-07-04T02:23:20Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400013.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x71cc1836911762c7b325c5dfd5be8d45f820717975986dd260e4bd72d61149a0. Chain 2 (Bitcoin): anchored in block 958415 (2026-07-17T12:50:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400014.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x80ba7541fa853a9386583844acf427b4e344cb2f1478b4d3a2742a60d9009c5b. Chain 2 (Bitcoin): anchored in block 959018 (2026-07-21T14:12:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x38497a054087b66fc66e7b3bb674ad48230d54e19ba6a53df41fc5cfab3fe610. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400028.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa5426ab52133813845a898a67f0161c8fbed2a01c08c824a98b0cc156330bdfb. Chain 2 (Bitcoin): anchored in block 956634 (2026-07-04T10:04:33Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400029.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa64f7ab5f3c84351fc4d03a144f518e6b68360048e4c3638de83ab73af0cfa4c. Chain 2 (Bitcoin): anchored in block 956713 (2026-07-04T23:03:25Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400030.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc7d5277fd93241a03b00e39a6b42cbedc9bb7f7d64c0aa2037448fafbe0e2729. Chain 2 (Bitcoin): anchored in block 958834 (2026-07-20T05:55:47Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400031.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xeb530f5c1a6b9d393b3a70cd10f24d6455e5de457ce1f5be1e802d632a601668. Chain 2 (Bitcoin): anchored in block 958462 (2026-07-17T23:17:53Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400032.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2123aa46c3c6c6d62fb0bf39879785d4a173b04529d41accbf71afe19dae30f7. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400033.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x4ab43da799367fba27540f0dbba1ecadba6318672fbc25f6e7ecc240b8b3e201. Chain 2 (Bitcoin): anchored in block 958501 (2026-07-18T05:33:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400034.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc43de6d093e4013a18b298bc1dcf30ed246b5c9a8fe70c70eb4de9e9cb212587. Chain 2 (Bitcoin): anchored in block 956711 (2026-07-04T22:48:52Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400035.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8a0a969aa5ad068766aaf7bd163d085a7f7051b046eba1bd6e5e93751335c876. Chain 2 (Bitcoin): anchored in block 958728 (2026-07-19T12:24:55Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/BCSSP2400036.